Film splicer



Aug. 24, 1926. l v 1,596,966

F. C. GRlswoLD FILM sPLIcER Filed sept) 15, 1922 2 sheets-sheet 2 iWYE/WOR ATTvR/vw Pamesa Aug. 2.4,A 1926.

UNITED V'fsTA'lTEs [1,596,966 PATENT oEFlcE.

FREDERICK CLARK GmswoL'n, or P01311` JEFrEnsoN, nnw'yonx, Assranon ToOLIVE A. Gnswonn, or roar JEFFERSON, NEW Yonx.

'FILM' srmorinh Appiicationmea september 13, 1922. semi No. 587,991.

Theobject of my invention is to provide .certain improvements iniilmsplicing ma' as to leave overlapping matched portions to be united.

fA practical embodiment of my invention is represented intheaccompanying drawinlgs, in which s Fig. 1 represents a top lan viewofthe r machine with the parts in t e positions they assume when theoverlapping end s o f the film sections are being united.

Fig. 2 repreesnts'a front View of the same.

lFig. 3 represents-a section taken in the" plane of the line III-III ofFig. 1.

Fig. 4 represents a. section taken in the plane of the line IV-IV ofFig. 1. Eig. 5 represents a section taken inthe two planes of the lineV-V of`Fig.,2, with the r1ghthand film clamp in its raised position; a.iilm scraper belng sho-wn in full lines and'dotted lines in operativepositions. Fi 6 represents a ilm scraper, which may be used inconnection with my machine, inside elevation.

Fig. 7 represents. a plan view of the trimmed ends of ad-jacent filmsections, sepauprise from the base of the .machine at the rated, and

Fig. 8 represents a similar view with the trimmed ends of the sectionsunited.

The base of. vthe machine is denoted by 1, andit comprises a-top portionand a peripheral .depending lia-nge. Lugs 2, 3, 4 and' backthereof,which lugs form supports for a-iixed shaft 6 ,on which the rightand left film clamps, to be hereinafter described, are loosely mountedto swing vertically into and vout of position.

A double shear block- 7 is seated at its 3 and 4,'and at rear endbetween .the lugs 8 d 9. h h

ugs an ,w 1c

uprise from the ront'of the base 1. Set

screws 10 and 11 carried vby the lugs 3 and 8 v""resjlectively, serve toremovably "clamp the double' shear blockin position. This shear I blockhas a iiat horizontal v'top' face on which lthe trimmedoverlapping' endsof the film sections are united. 1

The upper and lower jaws of ther left -lm clamp 'are cha hand filmclampare denoted by 12 and 13, which jaws are independently looselymounted on the lixedshaft 6 a coil spring 14 .being located between theu 2 and the film clamp for yieldingly presslng the film clamp laterallyto the limit of its movement toward the-double shear block, to ensurethe proper coaction of the cutting blade with the shear block. l

rEhe upperand lower jaws of the left hand ilmclamp are provided withsuitable handles 15 and 16, the'upper handle 15 being providedwith aspring catch 17 which serves the double function of locking the two jawstogether, and of'lockin the clamp Ato its adjustable stop 18 when t eclsmp is in its lowered positlon.

The lower jaw 13 of the left hand film lclamp is provlded with a shearblade 19 arranged, to coact with the adjacent side of the Y double shearblock 7 for trimming oil' the rough projecting end of the lm sectioncarried by immediately described.

The upper and lower jaws'ofthe right hand film clamp are denoted byf20,21,.

which jaws are independently loosely mounted on lthe fixed shaft 6, a'coil spring 22 being located between the lug `5 and the lm clampforyieldingly pressing the film clamp laterally to the limit of itsmovement the right hand film clampto be,

toward the double shear block, to ensure the The lower jaw 21 ofthisright handiilm clamp is provided with a shear blade 27 arranged tocoact with its adjacent side-of the double vshear block 7 for trimming.oli therough' projecting end of the ilmsection carried bytheleft`handfilm clamp.

' The lower jaws of the right and left hand'. i

eled 'along their up- Ipier faces to provideseats for receiving the msection adjacent. to vvthe ends to be for eng ng 'the' perforations aongthe sides .o

united, registering pins 28 being" rovided e film sections, the upperjaws of the right and left lm clamps bein'g provided with holes 29 forreceiving `the said registering pins when the jaws are closed.

The upper jaw of the left hand film clamp is provided with alongitudinally adjustable yielding combined guard and guide 30 having adownwardly turned lip 31 (preferably sharpened) arranged in position topress against the upper face ofthe projecting end of' the film sectioncarried by the left hand clamp. A combined guard and guide 32 is securedtothe lower jaw 13 of the left hand film clamp andit is provided with anu iwardly turned lip 33 (preferably sharpenedl) arranged to engage theunderface of the projecting end of the film Asection carried byl theleft hand clamp. These combined guards and guides serve two purposes;first, to limit the distance back so that the elnulsion can be scrapedoff from the upper face of the pro'ecting end of the e film sectioncarried by t e left hand film clamp, and second, to prevent thespreading of the cement along the film section between the upper andlower jaws of the film clamp.

The lowerjaw- 21 of the right hand film clamp is provided with acombined'guard and guide 34 havin an upwardly turned li 35 (preferably sarpened) the edge of w ich lip engages the underface of the projectingend of the film section carried by the right hand clamp. This combi-nedguard and guide serves to prevent the spreading of the cement betweenthe jaws of the right .within the base anda suitable button 40 may beprovided at the front of the 'base for controllingthe lighting of thesaid lamp 38. This lightingmeans will materially assist in the propermatching up of the lm sections, and also in manipulating the same. Abot-tom plate 41 for enclosing the base may 'be 'removably secured inposition by a screw 42 having an exterior handle 43, the

A shank of which screw is threaded into a lug 44 depending from the topof the base.

Suitable lugs 45, 46 depending from the top of the base serve toproperly position the storage battery 39'.

A cement reservoir 47 may be removably positioned within the base 1,with the mouth of the reservoir projectino' upwardly through a hole 48in the top olf the base.

ing an extended surface for engagement with the side of the shear block7. The shank of the holder has a recess 59, the end wall of which recessis provided with a double bevel forming an edge adapted to rest upon andslide along the horizontal portion 49 of the guide bar. To remove theemulsion from the projecting end of the film section carried by the lefthand film clamp, the scraper has to be tilted as shown in full lines anddotted lines in Fig. 5 to bring the scraping edge of the blade 54 intoengagement with the film section, thus preventing the scraper blade fromcutting the film during the removal of the emulsion.-

A stop bar 60 is carried by a plate 61 fast between the lugs 3 and 4 ofthe base in position to limit the vertical swinging movements of thefilm clamps.

It' so desired, adjustable stops 62 and 63 may be providedin the upperjaws 12 and '420 of the film clamps in position to limit the downwardmovements of the combined guard and guide 30 andof the presser blade 36.Adjustable tensioniscrews 64 and 65 are also provided in the upper jaws12'and 2O in position to adjust thetension of the com` bined guard andguide 30 and the pressei1 blade 36. A

In splicing the film sections together, the cycle of operations may beas follows:

The left' hand film clamp may be raised and the upper jaw of the righthand fllm clamp may be raised .to permit the placing of the Vright handfilm section in position with the end of the film section to be trimmedprojecting the required distance Inj,

beyond the shear block. The upper jaw of the right hand section is thenclosed, the presser blade carried by the upper jaw serving to hold theend of the film Section snugly on top of the shear block. The left handfilm clamp is then lowered to cause its shear blade 19 to trim saidprojecting end-of the film section.

The right hand film clamp isthen raised and the upper .jaw of the lefthand film clamp also raised sufficiently to permit the placing of theleft hand film section in position with the end of the film section tobe trimmed projecting the required distance beyond the shear block. Theupper jaw of theleft hand section is then closed, the downwardly turnedlip 31 'of the combined guard and guide 30 coacting with the with itsfilm section, thus leaving the eX- posed end of the `other film sectionin position where the emulsion may be removed therefrom by the filmscraper. The cement. .may then be applied to this exposed end of thefilm section, th'e downwardly turned lip of the combined guard and guide30 serving to prevent the cement from spreading too far back from theend of the film section.

' The right hand film clamp may then be again lowered, thus bringing theexposed end of its film section'onto the exposed treated end of theother film section, this movement bringingthe knife edge of thedownwardly turned lip 37 of the presser blade 36 into engagement withthe top overlapping film end to press the overlapping film ends togetheralong a median line.

This knife edge engagement of the presser blade will prevent the cementfrom being squeezed out of the joint between the overlapping ends, as,was a common fault where a presser bar of considerable width was used.The upwardly turned lip 35 of the combined guard and guide 34 serves toprevent the escape of the cement into the right hand film clamp betweenthe jaws. After 'the film ends have been firmly united,the

upper jaws of the right and left film clamps are opened to permit theremoval of the united film sections.

It is evident that various changes may be resorted to in the form,construction and arrangement of the several parts without departingfrom'the spirit and scope of my invention; hence, I do not intend to belimited to the specific details herein shown and described, lexcept asthey may be included in the claims.

'IVhat I claim'is:

1. Inv a film splicer, a double shear block,

a pair of swinging film clamps having cutting [with the shear block toso trim the film blades arranged to alternately coact sections as toleave overlapping ends, each film clamp comprising upper and lower jaws,a presser blade carried by the upper jaw of one film clamp in positionto yieldingly pressthe ,overlapping film ends together along a medianline on the shear block, a combined guard and guide carried by the lowerjaw of said last named film clamp, and coacting combined guards andguides carried by the upper and lower jaws of the other film clamp.

2. In a film splicer, a shear block, a vertically swinging film clampfor moving a projecting end of the film section onto and 'off from theshear block, the film clamp comprising upper and lower jaws, and alongitudinally adjustable presser blade cartically swinging film clampfor moving a projecting end of the film section onto and off from theshear block, a presser blade carried by the upper jaw of the film clamp,means for adjusting the tension of the blade, and adjustable stops forlimiting the downward movement of the blade.

5. In a film splicer, a shear block, a ver-` tically swinging film clampfor moving a projecting end of t-he film section onto and ofi' from theshear block, the film' clamp comprising upper and lower jaws, and4 alongitudinally adjustable combined `guard and guide carriedA by theupper jaw of the film clamp. Y

6. In a film splicer, a shear block, avertically swinging film clamp formoving a projecting end of the film section' onto and ofi' from theblock, the film clamp comprising upper and lower jaws, a combined guardand .guide carried by the upper jaw, and means for adjusting the tensionof the combined guard and guide.

tically swinging film clamp for moving a" projecting end of the filmsection onto and off from shear block, the film clamp comprising upperand lower jaws, a combined guard and guide carried by the upper v jaw ofthe film clamp, means for adjusting vthe tension of the combined guardand guide,

and adjustable stops for limiting the downward movement of the saidcombined guard and guide.

In testimony, that I claim the foregoing as my invention, I have signedmyfname this 11th day of September, 1922.

FREDERICK CLARK GRISWOLD.

